SU1638384A1 - Connection of cylindrical parts - Google Patents

Abstract

The invention relates to mechanical engineering and can be used to obtain composite structures of cylindrical parts of various lengths. The purpose of the invention is the expansion of technological capabilities. The connection of cylindrical parts comprises a female end 3 of one part to be joined and a male end 4 of another part, made with a threaded section 5 on the outer surface and with longitudinal grooves, a locking element consisting of 2 parts. The first part 10 of the locking element is configured to have limited longitudinal movement relative to the end 4 and interacts with the splines 15c with the interlocking spline surface of the second part of the locking element — a nut 6 mounted on the end 4 rotatably relative to the last. On the nut there are projections interacting with the longitudinal grooves of the end the height of said protrusions is more than half the pitch between the turns of the helix of the threaded portion of the male end 4 of the joined part 2 or 0 from 00 cj 00

Description

The invention relates to mechanical engineering and can be used to obtain composite structures from cylindrical parts of various lengths.

The purpose of the invention is the expansion of technological capabilities.

FIG. 1 schematically shows the connection, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

The joint contains a part 1 placed in the inner cavity 2 of the part 3. At the end 4 of the outer surface of the part 1 there is a thread 5 which engages with the nut 6, which is the second part of the locking element. A nut 6 is installed in a bearing 7 located between the cylindrical protrusion 8 at the end of the part 3 and the lid 9, in the cavity of which the first part 10 of the locking element and the spring 11 are located. The lid 9 is fixed with a thread and fingers 13 to the lid 9 by longitudinal grooves 12 Through the grooves 12 of the lid 9, the fingers 14 are screwed into the body of the part 10 of the locking element. Slots 15 are located at the retracted ends of the nut b and the first part 10 of the locking element, which are located in the depressions between the slots of the matching part. On the surface of the part 10 of the locking element cooperating with the end 4, there are made longitudinal protrusions 16 located in the longitudinal grooves 17 made on the threaded surface 5. The elevation angle of the helix of the surface 5 in terms of magnitude ensures the decomposition of the force applied to the part 1 in such a way that the tangential component of this force drives the nut 6 to rotate.

The connection works as follows.

If it is necessary to move the part 1 along the axis of the part 3, overcoming the force of the spring 11, the fingers 10 lift part 10 of the locking element. the threaded connection of the nut 6 and the part 1 into two components. One of these components coincides in direction with the applied force, and the other is directed along the tangent to the surface 5 and causes the nut 6 to rotate, resulting in the part 1 moving relative to the part 3. the longitudinal force, as a result of which the part 10 moves downwards under the influence of the spring 11, the slots 15 of the part 10 engage with the end face

nuts 6. By applying a longitudinal force in this position to the part 1, the impact of the tangential component of this force on the nut 6 is transmitted through part 10 and the fingers 14 to the non-rotary part 3, and the impact of the tangential component unfolded on the threads of the longitudinal force is transmitted through the walls of the grooves 17 the slots 15 of the part 10 of the locking element, which is made non-rotating relative to the detail 3.

The following embodiments are possible.

Instead of the protrusions 16, the ends of the fingers 14 may be used. The surface 5 may be made in the form of a tape, trapezoidal, etc. thread with a big step. The thread can be multiple. The downward movement of part 10 may be effected by the weight of this part. Instead of rolling bearings 7, sliding bearings can be used. Part 1 may not be rotatable, in this case there is no need for longitudinal projections. If, without these protrusions, the part 1 has the possibility of rotation, then to ensure its fixation in a predetermined position, the part 1 is fixed against rotation with respect to the part 3 by means of longitudinal projections on the part 10 of the locking element placed in the grooves 17 on the threaded surface 5 of the part 1.

The connection provides the possibility of fixing the cylindrical parts in intermediate positions, which allows you to adjust the length (height) of the assembly of two parts in composite structures. In addition, the proposed connection is applied in the case when one of the parts to be joined has the ability to rotate without the use of special measures. These circumstances greatly expand the technological capabilities of the compound.

Claims (2)

Claims 1. A connection of cylindrical parts comprising interlocking ends and a locking element with end splines, spring-loaded relative to one of the ends of the part being joined, which means that, in order to expand the technological possibilities, the connection is provided with a threaded section at the male end of the part and a second locking element with internal thread and end splines mounted on said end of the part with the possibility of rotation relative to the latter and interacting with the interlocking second splined surface of the first castle element installed with the possibility of limited longitudinal movement relative to the specified end of the part. 2. The connection according to claim 2, wherein the threaded surface of the male part has longitudinal grooves that interact with radial protrusions on the inner surface of the first locking element, the height of which is more than half the pitch between the helix turns of the threaded portion of the male end of the connected part. Aa Fa G. 2